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Apparently "files" implementation of hosts NSS database cannot deal with trailing period in host names. Previously name server.example.com which is was resolvable neither using dns nor myhostname NSS modules were rejected by installer (despite having matching line in /etc/hosts). These names which are resolvable purely using "files" database are now accepted. The problem is that I had to remove trailing period from names passed to getaddrinfo() function. This effectivelly enables search list processing. This means that items from the search list might be silently appended to the query and we might get an IP address for totally different names than we asked for. Unfortunatelly I see no way around this while keeping ability to use names from NSS hosts database. https://fedorahosted.org/freeipa/ticket/6518 Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>